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c. s. BUSHELL. I DEVICE FOR SETTING BAND SAWS.

APPLICATION FILED-JUNE 15, I914.

1,144,889. Patented June 29, 1915.

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33 1 -52 MW 17 I I m arrow THE NORRIS PETERS 60., PHOTC-LITHO. WASHINGTON. D4 c C. S. BUSHELL.

DEVICE FOR SETTING BAND SAWS.

APPLICATION FILED JUNE I5, I9I4.

wi bneooeo fla s THE NQRRIS PETERS ca, PHOTO-LITHCL. WlfiSHINGTON, D. C,

"to enter a similarly shaped openin Projecting horizontally from each of the standards 2 and 3 and overlying the body, portion ofthe base 1, is a bearing said pintles being preferably secured passing said reduced ends through The rollers a are revolubly mounted upon the pintles 19, as clearly shown in the drawings, and the gears 5 are carried rigidly by the inner ends of said rollers, the rigid relation; between said rollers and said gears being, efiected by providing each gear with an inwardly extending stud '22 which is adapted" in the? inner end of each of said rollers. Thus 'it' will be seen that said'rollers will revolve unison, when the machine is in operation, as will be hereinafter set forth. The setting dies 6 are of annular formation and are-secured to'the outer ends of the; rollers 4. by'means of screws23 which arepassed therethrough and'into threaded sock-' ets in the outer ends of said rollers, the gears" 5, the rollers 4:, and the dies 6 beingheldf rotatably upon the pintle s 19 by meanso'ff washers 24 and screws 25, the latter passing; through said washers and being threaded in sockets formed in the outer ends of the" pintles 19,-'it being understood that the wash-Q ers 2% are or gr'eater'diameter than the open ings within the" various elements mounted-on; said p'intle's. Each die 6 is provided on its periphery with a plurality of alternately dis-', posed teeth and notche's'26 and27, the teeth f or one die engaging the notchesof'the other die, as the parts are rotated. As clearly? shown in thedrawings, the outer edges of the'teeth 26 are s aceda'greater distance from the centers 0 the dies "6 than the inner edges thereof, the peripheries, ofsaid teeth inclinin from said outer toward their inner edges. t will also be noted that the inner walls'of the notches 27 incline from the pe-' riphery of the rollers & toward the center of said dies. By this formation of the notches and teeth, the proper inclination Will be'give'n to each tooth or the saw blade B a manner to appear.

For the purpose of guiding the blade B" I provide a set screw28 which is threaded? through a boss 29,'the latter rising rigidly" from the movable standardB and overlying" the space between the gears 5. L

The operation of the device so far de scribed, is as follows: The teeth of the saw" blade B are first run over a file, which lattermay well be carried by one end of the base" T as shown at 30, whereupon said base is clamped upon the table with its slit 7 strad dling said blade. The movable standard 3 which now stands retracted, is moved to ward the standard 2 through the action of the screw and the crank 16, this operatioii' bringing the rollers 4: into contact with the" pintle 19, I

opposite-sides of the blade B, meshing the {teeth of the gears 5, and correctly position ing the teeth 26 in respect to the teeth of the to said blade B. The set screw 28 is now rotated in standards by reducing theirends as=at; rythe proper direction to cause its inner end said. who .contact with the smooth edge of said saw standards, and threading nuts 21 thereon,

blade, which latter, may now be set in motion bythe power employed in running the 5 S"ame"or by other sii'itable means. The blade B in descending on the side in which the setting, machine is. in operation, will cause its't'e'eth to contact with the die teeth 26 and will thus rotate said dies, the rollers 4 and gears'ii'this operation efi'ectually bending the teelth'joi' the blade in opposite directions.

From the abovedescription, it will be seenv thatthe teeth of'a band saw may be readily set without the necessity of removing said saw from the machine on which it is emf Plbyd. This fe is extremely advan" tageous and a great improvement over de-' vices of the character now on the market.

fse'tting some-forms of band saws, as

for instance, those which are normally driven by means too powerful for use connection with saw setting machines, it'becomes expedient to drive one of the rollers i and the parts carried thereby by hand. For this, purpose, I have shown in Fig. 7 an adequate means for performing this funcg tion, saidv means consisting of a crank 31 whichds'i'igidly "secured to one end of the pintle 19 which is in this case, journaled' through the mevable post 3' and rigidly carries'the roller 4:, gear 5, anddie 6. The operation of the crank 31 will cause the roller 4: and its co-acting parts to be rotated, andfthis action will drive the rotating parts on the opposite side of the machine," and will draw the blade Bi downwardly, the setting operation being precisely the same as in the form previously described.

"From the above description, it will be readily seen that in the first form of the invention, the saw blade 13 drives the teeth setting mechanism, while'in the second form, the setting mechanism moves the saw blade.

I wish to lay particular stress on the spacific construction of the base 1 and the mounting of the rollers 4:, since by the construction herein described, it is not neces-'' sary to remove the saw blade from the 1113: chine as above mentioned.

In Fig. 8, I have shown a roller 4: adapted to be mounted in the same manner as the rollers 4:, said roller having alternately dis' posed teeth and spaces 26 and 27 respectively, the formation of the teeth and the inclination of the spaces therebetween being identical with the form previously described.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

The combination with a base, an integral standard rising from one corner of said base,

and a transverse groove with inwardly projecting upper side edges formed on the other corner of the base, a standard with a d0ve tailed lower end adapted to be slidably mounted in said groove, a transverse rod through the two standards adapted to move the slidable standard to and from the integral standard on the same plane therewith, a pair of parallel stub shafts projecting horizontally from the standards and carrying saw engaging rollers overlying the base, a pair of interengaging dies on the outer ends of said rollers and a pair of. intermeshing gears on their inner ends, of an upwardly and inwardly extending integral ear from the slidable standard and held thereby above but between the rollers to engage the smooth edges of the saws being set.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- 25 nesses.

CHARLES S. BUSHELL. Witnesses:

H. W. ADAMS, ZULA VOSBURGH.

Copies of this {patent may be obtained for five cents each, by addressing the Commissionen of Patents, Washington, D. G. 

